Field Reference 06 (See Field Reference 19) 



SHIP DESIGN - MANOEUVRABILITY, STABILITY AND STEERING 

 SYSTEMS 



The work of interest to this section is concerned with the manoeuvrability and 

 directional stability of ships and boats, and also the associated optimum automatic 

 steering system. Of immediate interest is steering and manoeuvring in shallow water 

 at slow speeds, as typified by harbour approaches, and a longer term interest is the 

 mathematical description of the motion of a ship with random wave disturbance. 



Also considered under this section is transverse stability which requires invest- 

 igation for fine ship forms travelling at speed in calm water and in a seaway. The 

 effect of speed is to alter the righting ability of a ship and this is further modified by 

 the passage of waves. 



Recommended Topics 



The development of analytical techniques for the determination, at the design 

 stage, of manoeuvrability and directional stability properties leading to specifications 

 for optimum automatic steering systems. 



The determination of manoeuvrability and stability of hydrofoil craft and hovercraft. 



The determination of ship manoeuvrability characteristics at slow speeds in 

 shallow water and in channels. 



The determination of transverse stability at speed and in a seaway. 



Field Reference 07 



PLATFORMS AND STRUCTURES AT SEA 



Recommended Topics 



Foundations 



Foundations on various types of sea-bed. 

 Buoyant foundations. 



Effect of structures on erosion and sedimentation. 

 *Scouring action in vicinity of fixed structures. 

 Erosion and sand movements around underwater pipes. 



Design Loads 



Wave forces on pipes and columns. 



Properties of random waves and corresponding response of structures. 



Full scale measurements on structures. 



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